[NETFILTER]: Filter dumped entries based on the layer 3 protocol number
Dump entries of a given Layer 3 protocol number.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 4f2e509..73ab16b 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -400,6 +400,8 @@
return 0;
}
+#define L3PROTO(ct) ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num
+
static int
ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
{
@@ -407,6 +409,8 @@
struct nf_conntrack_tuple_hash *h;
struct list_head *i;
u_int32_t *id = (u_int32_t *) &cb->args[1];
+ struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh);
+ u_int8_t l3proto = nfmsg->nfgen_family;
DEBUGP("entered %s, last bucket=%lu id=%u\n", __FUNCTION__,
cb->args[0], *id);
@@ -418,6 +422,11 @@
if (DIRECTION(h) != IP_CT_DIR_ORIGINAL)
continue;
ct = nf_ct_tuplehash_to_ctrack(h);
+ /* Dump entries of a given L3 protocol number.
+ * If it is not specified, ie. l3proto == 0,
+ * then dump everything. */
+ if (l3proto && L3PROTO(ct) != l3proto)
+ continue;
if (ct->id <= *id)
continue;
if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid,
@@ -444,6 +453,8 @@
struct nf_conntrack_tuple_hash *h;
struct list_head *i;
u_int32_t *id = (u_int32_t *) &cb->args[1];
+ struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh);
+ u_int8_t l3proto = nfmsg->nfgen_family;
DEBUGP("entered %s, last bucket=%u id=%u\n", __FUNCTION__,
cb->args[0], *id);
@@ -455,6 +466,8 @@
if (DIRECTION(h) != IP_CT_DIR_ORIGINAL)
continue;
ct = nf_ct_tuplehash_to_ctrack(h);
+ if (l3proto && L3PROTO(ct) != l3proto)
+ continue;
if (ct->id <= *id)
continue;
if (ctnetlink_fill_info(skb, NETLINK_CB(cb->skb).pid,
@@ -750,9 +763,6 @@
if (nlh->nlmsg_flags & NLM_F_DUMP) {
u32 rlen;
- if (nfmsg->nfgen_family != AF_INET)
- return -EAFNOSUPPORT;
-
if (NFNL_MSG_TYPE(nlh->nlmsg_type) ==
IPCTNL_MSG_CT_GET_CTRZERO) {
#ifdef CONFIG_NF_CT_ACCT
@@ -1251,12 +1261,16 @@
struct nf_conntrack_expect *exp = NULL;
struct list_head *i;
u_int32_t *id = (u_int32_t *) &cb->args[0];
+ struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh);
+ u_int8_t l3proto = nfmsg->nfgen_family;
DEBUGP("entered %s, last id=%llu\n", __FUNCTION__, *id);
read_lock_bh(&nf_conntrack_lock);
list_for_each_prev(i, &nf_conntrack_expect_list) {
exp = (struct nf_conntrack_expect *) i;
+ if (l3proto && exp->tuple.src.l3num != l3proto)
+ continue;
if (exp->id <= *id)
continue;
if (ctnetlink_exp_fill_info(skb, NETLINK_CB(cb->skb).pid,
@@ -1298,9 +1312,6 @@
if (nlh->nlmsg_flags & NLM_F_DUMP) {
u32 rlen;
- if (nfmsg->nfgen_family != AF_INET)
- return -EAFNOSUPPORT;
-
if ((*errp = netlink_dump_start(ctnl, skb, nlh,
ctnetlink_exp_dump_table,
ctnetlink_done)) != 0)